pollen zone 中文意思是什麼

pollen zone 解釋
孢粉帶
  • pollen : n. 1. 【植物；植物學】花粉。2. 【蟲類】粉面。vt. 授粉給；傳粉給；用花粉掩蓋。
  • zone : n 1 【地理】（地）帶。2 區域，范圍，界。3 〈古、詩〉（腰）帶。4 圈，環帶。5 【數學】（球面）帶；...
  1. Abstract : the main characters and seed set of bc1 ， bc2 ， bc1f2 from ms line back - crossing with the pollen of hybrid rice were studied. the appearance of a large number of self fertile plants in ms line was analyzed. the effect of introgression of restoring genes on ms line purity and hybrid yield in indica and japonica rice was discussed. it was pointed out that “ iso - cytoplasm restorer line ” was seriously reducing the purity of ms line and that hybrid rice was unsuitable for isolation zone in the seed production fields

    文摘:研究了雜交稻花粉對母本不育系回交後代群體bc1 、 bc2 、 bc1f2的主要農藝性狀和育性表現，分析了不育系中出現大量自交結實株的原因，討論了恢復基因滲入對秈、粳不育系純度和雜交稻產量的影響，指出「同質恢」對降低不育系純度的嚴重性和雜交稻作制種田隔離區的不合理性。
  2. The haploid pollen cells develop in the tapetal zone from spore mother cells

    單倍體花粉細胞由絨氈層提供營養發育。
  3. According to the derived spore - pollen percent diagram and spore - pollen concentration diagram, the sequence of vegetation change recorded in the malan loess of xishan mountain, beijing area is as follows : zone p1 : in this zone the herbal pollens were overwhelming and the total pollen concentration was relatively high, so the vegetation during this period was arid grassland

    P3帶，該帶總體上花粉濃度較小，花粉濃度出現了多次波動，表明該時期氣候不穩定，植被在荒漠草原和乾草原之間變化。該帶可以分成下列5個亞帶： p3 ） ， p3 2p34pm和p3 5 。
分享友人
分享到 Line

分享到臉書